IMF owners thread!

[Tor-S]

Currently playing

 

[IMF_Pioneer]

Nice stands.

Must admit I've always felt that 5/36 Mid/Bass driver was a bit too small for the cabinet size of the MCR2A system. This was an attempt at the LS3/5a market but trying to add a bit more Bass than what the competition had to offer.

 

[Tor-S]

Nice stands.

Must admit I've always felt that 5/36 Mid/Bass driver was a bit too small for the cabinet size of the MCR2A system. This was an attempt at the LS3/5a market but trying to add a bit more Bass than what the competition had to offer.

Thank you, i made them for these small speakers.

I have both. Audiomaster LS3/5A and these MCR2A. The Audiomasters feels more heavy than these, bass heavy. The MCR2A sound very different actually, more transparent.
Its all about the listeners taste. I like both

 

[Wilburchubs]

Hi Yvan and IMF_Pioneer, and others,

You want pics? ROGER>>>>>WILLCO! (but not yet!)



I don’t know the history of these before 1999: whether they were domestic or in a studio. Cosmetically they are pretty good, with no obvious abuse, cigarette burns, cup rings etc, and all the drivers seem to be working, Don’t hear a lot from the super tweeters but then my ears are temporally challenged since I’m a few years older than them, I don’t think I’ve ever polished them, and though I’ve got the grille covers I prefer them naked!
I’m going to remove the B139 soon, so I can check out which crossover I’ve got, before I send to Falcon for the caps. Obviously I will photograph them for the thread. I’ll probably rehang the B139, assuming the wires are long enough, although I may renew the wiring while I’m in there, (any thoughts on this?)
At the moment they are technically the wrong way around. I currently have the tweeters on the outside because I thought I’d get a wider soundstage. I know, I know…..it seemed like a good idea at the time!
Besides once you’ve put them down you don’t want to move them, although since they are on castors that’s no big deal.

Actually about 18 years ago, somebody asked me if I could supply a PA system for a charity music gig in a local church hall. As I had a trailer with a ramp, I agreed. I used a chunky MOSFET PA amp I had, along with a small desk and about three mics.
From memory they sounded good in the bigger space, and I took my cassette deck, and probably some Steely Dan or Donald Fagan to show how cool I was! They survived the gig, didn’t blow anything, and they haven’t been out of the house since. I’d love to get them out in the garden though. Last century I was living in a shared house and we had a summer party, so one of my KEF kit 3’s was placed out of the first floor window on the downstairs bay window roof, and it sounded AWESOME. Once you take away the room, speakers can really breathe.

When I recap I will put the PM’s the right way round. I’ll do them one at a time, so I can evaluate the results. Having slogged through all 96 (YEESH!) pages of this thread, I will be interested to hear the difference. People’s mileage on this seems to vary: some report a great improvement, some not. I’m hoping for an obvious improvement, but I don’t feel the need to go for any Rolls Royce caps, like Yvan has!
I will go for the 2% tolerance though: for the few extra pennies it’s a no-brainer. It’s been a few years since I wielded a soldering iron (I love the smell of flux in the workshop!), but I still have a stock of real solder for the job, and one of those fancy sucker things to extract the old stuff. Be good practise for when I get my Claymore on the bench, since that has an intermittently noisy capacitor in its RH channel power amp.
I also have a 60’s Fisher tuner amp (the one with Nuvistors in, along with valves), that somebody gave me to look at about the time I bought the PM’s. From memory, it was dead on one channel, but I diagnosed it as just needing a new coupling cap between preamp and power amp. It is still in its original box, and after 20 years it may well need further work - certainly will need careful powering up with the variac. Also have a Leak Troughline 2 tuner that I would like to get going while we still have FM radio. When I retire…. Yes I love my older hifi! A bigger house would be helpful though.



How do I put a photo on my ID BTW? At the moment I’ve just got the generic symbol. And also how do I get a blue line under which I can list my system details? Generally I’m just a lurker on forums (fora? - my Latin O level just kicked in!), so I’m not really au fait with how this stuff is done.

Dan.





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Hi Dan!
UK user here,I redid my 50's,80's and more recently RSPM IVi with the Falcon Kits-worth going the extra few quid.
Steely Dan& DF/WB fan here too. Caves of Altimara from The Royal Scam sound's f'in incredible!!
Have fun!
Paul

 

[IMF_Pioneer]

i made them for these small speakers.

I always love seeing custom one off made things opposed to factory made mass production items, and especially timber made items. I've got a real soft spot for trees that have given up their life for our enjoyment. I've just given my Celestion SL6 their second lease of life today with their cabinets being refinished and well on the way to being just like new when finished, but the photos of that are in the Celestion thread under the British Audio Sub-Forum.

Again love your work Tor-S !

 

[Tor-S]

Some upgrades on the MCR2A's.
All Mundorf Supreme alu In Oil and new internal wiring.

The wires are:
Duelund DCA16GA tinned copper multistrand wire in cotton and oil.
To the tweeters i used the DCA20GA version.

These Supreme Alu in Oil sound very similar to Alcap, but way more open and detailed without making the sound bright.

 

[Tor-S]

I've made a Schematic of the MCR2A crossover as it was when i bought them, can not verify that these are 100% original untouched filter, but they did look original.

Have not seen this on internet before, but here it is

If someone here in the thread have these speakers it would be nice to verify the values.

 

[Tor-S]

Bigger Picture

 

[IMF_Pioneer]

Just a heads up, for all those who are on the Facebook platform, there's an "IMF Electronics" page now for everyone to join and discuss their products.

It was just started a few days ago so one might have to scroll down to find it as it has no members as yet and thus isn't high up on the search list.

 

[IMF_Pioneer]

Just a quick inquiry,

Does anyone have a spare set of Mid range drivers from a set of Super Compact II's that they are willing to part with ?

Cheers.

 

[MonitorIMF]

Hello, does anyone have a schematic of a super compact 2? I'm looking for the values of the inductors. Would appreciate any info.

 

[beekeeperDan]

Hi, I have some IMF ALS40 MK1 speakers I am restoring and I am struggling with the Midrange foam. These speakers had been badly refoamed with an incorrect part at some point and I appear to be missing a grey ring that I can see in other photos of these speakers, I'll post an example shortly. Am I missing something? I believe these are ELAC 4EM/101 speakers and goodhifi do refoam kits but the OD seems wrong, except if I am missing something (the grey ring which looks like cardboard?). Any help greatly appreciated. Thanks, BKD

 

[beekeeperDan]

Here is the grey ring which appears to be missing on my speakers.

 

[Yvan_donald]

Hi, I own tls50 mk1 ,a set of als40 but the mid is EMI on both, surround is like strech plastic membrane,can be a EMI with different surround with the cardboard ring? From the back look like EMI ,even the letter look similar to me.best regards,Yvan.

 

[beekeeperDan]

Aha! The perished "foam" looked like a bit of plastic! Thanks Yvan, I will try and find new foam for EMI! Does anyone knows where this foam could be obtained?

 

[SimplySound]

Aha! The perished "foam" looked like a bit of plastic! Thanks Yvan, I will try and find new foam for EMI! Does anyone knows where this foam could be obtained?

I was going to say that it looks like the glue or something, not an actual component of the surround. You might want to try Bao Nguyen... he has done all of my KEF B250's and does a superb job. He might know of a surround that will work.

Bao Nguyen
SPEAKER REPAIR PROS <contact@speakerrepairpros.com>
Speaker Repair Pros
10382 Stanford Ave Ste J
GARDEN GROVE, CA 92840
MON-THURS 9AM-6PM
CLOSED FRI, SAT, SUN
(714) 591-5082

 

[tmarx]

I don't know if this will help you, but I'm posting a photo of one of my IMF midrange units which I had professionally re-foamed a few years back. The person who did this for me said it took some time to find the right size foam surround, and that he ended using one make for a JBL driver. I believe he also had to trim one or both of the edges to get the foam to fit correctly, but they look perfect now.

IMF Mid with new foam surround

• tmarx
• Jun 5, 2020
• 1

Here's one of the IMF midrange units that I had professionally re-foamed a few years back.

 

[beekeeperDan]

I was going to say that it looks like the glue or something, not an actual component of the surround. You might want to try Bao Nguyen... he has done all of my KEF B250's and does a superb job. He might know of a surround that will work.

Bao Nguyen
SPEAKER REPAIR PROS <contact@speakerrepairpros.com>
Speaker Repair Pros
10382 Stanford Ave Ste J
GARDEN GROVE, CA 92840
MON-THURS 9AM-6PM
CLOSED FRI, SAT, SUN
(714) 591-5082

Thanks, I may have to contact them for advice if my man in the Netherlands can't help! He's looking into it.
Many thanks,
Daniel

 

[tmarx]

Here's a photo of the back of the mid-range.

 

[Yvan_donald]

Hi, here some pictures of the mids more commun in the first generation,EMI mids,the magnet seems smaller,thin plastic or rubber surround almost flat.